Sash-balance.



J. A. SHARPS.

SASH BALANCE.

APPLICATION FILED JUNE 23,1915.

1,172,063. Patented Feb 15,1916.

THE COLUMBIA PLANOGRAPH c0.. WASHINGTON. D. c

' in a spring winding shaft 8 which is shoulered at both ends as shown at 9 and 10,;the

sAsn-ia' LAnos;

To-all whom it may concern.

Be it known that 1, JOHN A. SHARrs, citizen of the United States,-residing at Bablin, in the county of Lewis andState of West Virginia, have invented new and useful Improvements in Sash-Balances, of which the following is a specification. j j This invention relates to balances, the principal object of the invention being to provide simple and convenient means for adjusting the tension of the spring whereby the device may be'employed "for light-or heavy sashes. I Another object 'of the invention is the provision of a device of thischaracter which is so constructed that it may be conveniently attached to theunder side of the window frame for operation in connection with the lower sash or attached to the framework of the building above the window frame for operation in connection with the upper sash.

' Further objects; of the inventionwill ap-.

pear as the following specific description is read in connection with the accompanying drawing'which forms a part of this apphcar 'tion, and in which v Figure 1 is a front elevation of a window frame showing the device applied thereto and with the part ofthe frame broken away 1 to show the position of the upper sash'balance. Fig. 2 is a verticallsectional view through one of the spring casings. Fig. 8' is a plan View of one of the spring casings with the top plate removed.

Referring more particularly to the draw- I ing 1 represents an ordinary window frame having upper and lower sashes and 3 slidably mounted therein. As each sash 1s operated by asimilarly-constructed .balance,

the description of one will be sufficient.v The balance for the lower sash 3 is secured to the under side of the upper portion of the window frame 1 as shown in Fig. 1 and consists of spaced" plates land 5 heldtogether by screws*6 which pass through the spacing sleeves 7 The plates have j ournaled therelatter shoulder being'serrated or roughened to correspond with similar serrations formed on the inner side of the plate .5 as shown. Projecting beyond the shoulder 10 is a reduced threaded stem 11 upon which is 'Each plate 4 and 5 havesurrounding the 11 mm: A; snares, or 'BABLinfwnsr vrnernraf Specification of Letters Patent Ariblieati'onfiled une as,1915.se iainmsasasx 4 7 mounted a locknut 12 and the-outer end of I central aperture therein an annular groove 14 in which is received the edge of a tape drum 15 and between this drum and the from in opposite directions,a pair of tapes ormetallic bands which pass over pulleys 0 shaft 8 is located a spiral spring, one end 7 16 secured inbrackets 17 fat opposite sides of the frame and fromi-thence to their attachment with opposite sides of the sash 3. I The balance" for the upper sash'is con-,

structed identically'as described forthe, balance of the lower sash but is secured upon a vertical support above the window "frame and behind the trim strip which in Fig. 1 isbroken away. The pulleys 18 are secured upon brackets 19 above the window frame and-the tapes running thereovenpass downthrough the apertures in the upper portion of the window frame and are attached at their terminals to the upper sash 2; The,"

inner plate 4 of either balance is preferably provided with laterally extending earsQO' to receivesecuring devices for securing.- the' balance tothe window frame softhatthe outer plate does not have to be removed when it is desired to disconnect the balance from the frame.

When it is desired to adjust the tension of the spring a set screw or nut 12 is loosenedand a screw driver or other similar turned until the required tension is 1 ro duced. The thumb nut '12 is then screwed up on the stem 11 binding the shoulder 10 7 against the inner side of the plate 5. What is claimed is 1. A sash balance comprising a pair of spaced parallel plates, a shaft'journaled in said plates, a spring securedto the shaft'and surrounding the same, a drum surrounding ble members connected to the drum and to 7 the sash.

v 2. A sash balance comprisinga pair of p instrument placed in the ear 13, the shaft 8 spaced parallel plates, a shaft rotatably sion for clamping the shaft against oneof 10 mounted therein, said plates having an anthe plates and preventing rotation thereof; nular groove surrounding the shaft, a drum In testimony whereof I aflix my signature mounted to rotate in said groove concentric in presence of two Witnesses.

with the shaft,.a s iral s rin connected to Q the drum. and shaft? a thr aded extension on JOHN the shaft passing through the plate, means Witnesses: to rotate the shaft to. Wind the spring H. O.- WILSON, thereon and means threaded on the exten- C. M. VVEAYER.

Copies of this patent may be obtained for five cents each, by addressing the, Commissioner of Patents,..

Washington, I); C." 

